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Lennox Furnace FAQs

Q: What types of Lennox Furnaces are available?
A: Lennox offers a wide range of 80% and 90% Natural Gas furnaces, as well as electric and oil furnaces. There are several models available in each type.   

Q: Why does Lennox offer such a large range of furnaces?
A: There are several different factors: required BTUs, blower size, blower type, CFMs produced, external static pressure, location/application, efficiencies, and cost.

Q: What are the major differences in the Lennox furnaces?
A: There are several: type of igniter, furnace construction, type of blower, single or 2-stage gas valve, efficiency, warranty, and application.

Q: Are Lennox furnaces LP ready?
A: All Lennox gas furnaces can be converted to LP.

Q: Are there limitations about where a Lennox furnace can be installed?
A: Yes, there are certain locations that furnaces cannot be installed (please check with manufacturer's installation instructions, your heating contractor, and local building codes). Typical furnace locations include garages, attics, crawl spaces, and indoor closet spaces.

Q: What does external static pressure mean? Should this be a factor in my Lennox furnace purchase?
A: External static pressure relates directly to how much air (CFMs) a furnace can deliver, given the location altitude and air restrictions placed on it (i.e. filter, ducting, and refrigeration coil). External static pressure should be a consideration that your heating contractor should be aware of when discussing new or replacement equipment.